Agitating and grinding mechanism.



E. B. GOODWIN. AGITATING AND GRINDING MECHANISM.

APPLICATION I'ILEI) JAN. 19, 1910.

Patented Jan. 16, 1912.

3 SHEETS-SHEET 1.

E. B. GOODWIN. AGITATING AND GRINDING. MECHANISM.

APPLICATION FILED JAN.19,-1910.

1,014,871 Patented Jan. 16,1912.

3 BHEETSr-SHEET 2.

E. B. GOODWIN. AGITATING AND GRINDING MECHANISM. APPLICATION FILEDJAN.19, 1910.

3 SHEETSSHEET 3.

Q Q g (b auvmm QMM 4 N cuLummA I'LANUGIZAPH CO.,WI\SHINGTON. D. c.

Patented Jan. 16, 1912 EDWIN B. GOODWIN, OF PUZZLER, COLORADO.

AGITATING AND GRINDING MECHANISM.

Specification of Letters Patent.

Patented Jan. 16, 1912.

Application filed January 19, 1910. Serial No. 538,879.

To all whom it may concern:

to provide improved mechanism of the class ordinarily and technicallyknown as ar-. rastres, and embodying new and improved features forthoroughly and completely; grinding and disintegrating the ore massesfor agitating ore pulp and for aiding in the;

process of amalgamation.

gards the power required but which shall, at the same time, be efiectiveand eflicient as regards the amount of grinding surface operated and theamount of ores subjected to atmospheric action.

A further object of the invention is to provide an arrastre with aninclined floor with drag stones drawn over such inclined floor andthoroughly agitating the same, thereby rendering said particles amenableto amalgamation with mercury and aiding in such amalgamation.

The present invention is presented as a continuance of co-pendingapplication Serial Number 457,666, filed October 14, 1908, so

far as the arrastre is disclosed in said c0- pending application, andalso a continuance of co-pending application, Serial Number 492,680,filed April 28, 1909, so far as such arrastre is disclosed in saidco-pending application, but with description of construction, operationand uses given more fully than in said co-pending applications.

With these and other objects in view, the invention comprises certainnovel constructions, combinations and arrangements of parts as will behereinafter fully described and claimed.

In the drawings :Figure 1 is a top plan View of the improved agitatingand grinding mechanism. Fig. 2 is a diametrical sectional view of theimproved agitating and grinding mechanism taken on line 22 of Fig. 1.Fig. 3 is a view in side elevation with part of the rim and screenbroken away and showing a slightly different embodiment of theoperatingfeatures. Fig. 4 is a view in transverse section as on line 44 of Figs.1 and 2 showing the means for connecting the drag stones with the radialarms and permitting the adjustment of such stones.

embodiment of the machine the floor of which is an inclined plane.

Like characters of reference designate corresponding parts throughoutthe several vlews.

The base 10 is composed of an approved material and preferably formedupon its upper surfaceintegrally to produce a floor 11 having itsperipheral edges sharply upturned as at 12 and sloping from suchperipheral upturned edge downwardly toward the center with an upstandingcone at the center preferably higher than the upper edge of the upturnedportion 12, or said floor may be constructed with a continuous slantfrom one side to the other as shown at Fig. 5, the upturn at the edgehaving its upper rim level all around but its depth increasing with theslant of the floor from one side to the other as shown by the dottedlines. Axially of the cone 13 a shaft 14 is mounted serving as the axisfor a plurality of radial arms 15 pivotally mounted upon such shaft 14:by any suitable means such as central disks or plate-like portions 16and connected at their extremities with a circular rack 17.

About and above the upturned portion 12 of the floor a circular track 18is constructed supported above the same in any approved manner as by theposts 19 and the space between such track 18 and the upper edge of theupturned periphery 12 filled by a screen 20 for the whole circumferenceor for any desired portion thereof. The radial arms 15 5 Fig. 5 is atransverse sectional view of an i A further object of the invention isto provide a mechanism of the class described, the operation of whichshall be economical as re are provided with rollers or idlers 21 mountedadjacent the rack 17 andbearing upon the track 18. To rotate the radialarms and rack a gear 22 is intergeared with such rack and carried upon ashaft 23 which, in turn, is driven by any approved means as the pulley241: for transmitting power to such pinion 22 and rack 17.

Upon the floor 11 a plurality of drag stones 25 are disposed to whichare connected chains 26, the opposite ends of which are connected withthe radial arms 15 in any approved manner as by cllps 27 shownparticularly at Fig. having loops 28 for en-' gagement with such chains,and a bolt 29 for tightening such clips upon the arm 15. It will beapparent that by loosening the screw bolt 29 the clips 27 may beadjusted longitudinally of the arms to vary the path of travel of thedrag stones 25 and consequently prevent uneven wear upon the floor .11;Another object of changing the position of the drag stones is that theirorder may be changed so that the contained material will be throwntoward the center or toward the circumference as desired. It willreadily be seen that with the stones placed in the relative positions asshown in Fig. 1,

with the rotation of the radial arms in the direction as thereindicated, they form a 'spiral'running from periphery to center as Itwill also be readily seen that by reversing therelative position of thestones a spiral would be formed run-E the arms rotate.

ning from center to periphery as the arms rotate.

lar ore mass to be treated or process being used at the tlme, or thestones could be arranged irregularly, for example so that the tendencyofone to throw the material toward the center would be offset by thatofanother to throw it toward the periphery,

etc.

As shown at Figs. 1. and 2 the idlers 21- forsupporting the rack 17 arecarried and moved with such rack. At Fig. 3 the idlers 22 are shown asjournaled upon the upper edge of the .upturned portion 12 of the floorand the rack 17 moves independently of. such idlers but is carried uponthe periphery thereof; in other words-the'axes of such ldlers remainstationary lnstead of movlng "with the rotating parts as shown at Figs.

1- and 2. In either embodiment an upstanding flange 30 is formed aboutthe upturned portion 12 of the floor forming outside of the screen, acircular or annular trough which receives material thrown through thescreen by the centrifugal action of the stones or which overflowsthrough the screen by reason of the material upon the floor rising to alevel above the edge of the upturned portion 12. y

In operation the ore ground'in the ordinary stamp mill or. otherwise andin solution preferably of a solvent is introduced upon the floor 11 ofthe arrastre and the drag stones moved over such floor by rotating therack 17 and with it the radial arms 15. As the drag stones are movedover the floor through the pulp upon such floor the action between thestones and the floor is to grind the ore to a still finer consistencyand also by reason of the consistency of the pulp and the slant of thefloor to leave in the wake of each stone a portion of the floor coveredonly by an' infinitesimally thin layer of the pulp over which the stonehas passed. The passage of the stone and the exposing of suchinfinitesimally thin layer of the ore suspended in solvent exposes tothe action of the atmosphere the freshly exposed surfaces of theparticles of the ore in conjunction with the solvents so that thefreshly exposed ore is simultaneously acted upon by the air and thesolvent.

This apparatus is especially designed for carrying into effect theprocess disclosed in co-pending application, Serial Number 457,667,filed October 1 1, 1908, but is equally efficient when used for thepurpose of amalgamation either with or without said process. WVhen usedfor amalgamation purposes the desired quantity of mercury is placed inthe arrastre and tends to flow toward the lowest part by reason of theslope of the floor. The action of the revolving drag stones, howeverkeeps it spread out over the floor and thoroughly mingled with the pulpso that its action upon the free metal liberated by the grinding is verycomplete and efficient. Moreover the action of the drag stones polishesall rusty or coated particles of metal and thus renders them amenable toamalgamation.

The most complete exposure to the atmosphere is obtained by placing uponthe floor .at one time only sufficient of the pulp to cover the lowerhalf of the floor when at rest so that as the stones revolve a portionof the pulp will be washed up onto the otherwise bare portion of thefloor, and, flowing back toward .the lower part the pulp will spreaditself into a thin layer and thus exposure to atmosphere will beaccomplished in addition to that hereinabove described.

In operating the mbodiment of the in- *vehtion as shown at ig. 5 it isintended to fill material on to the floor so that the upper edge of thesloping floor is not covered by the material and receives material onlyas it is dragged by the drag stones up on to such portion. In this way avery thin film of the material is dragged by the stones onto theuncovered portion of the stone and is there subjected to the action ofthe atmosphere ih combination with solvent to carry out the processdisclosed in co-pending ap plication Number 457,667.

WVhat I claim is 1. In a mechanism of the class described, a floorconstructed as an inclined plane, means moved from the center of thefloor for dragging weights over such floor and means to care for theoverflow from such floor.

2. In a mechanism of the class described,

a floor constructed as an inclined plane,

drag stones disposed upon the floor and means centrally of the floor formoving the drag stones.

3. In a mechanism of the class described,

a floor constructed as an inclined plane and operating means mountedcentrally of the floor.

4. In a device of the class described, a floor constructed as aninclined plane, drag stones mounted upon the floor and means to move thestones upon the plane.

5. In a mechanism of the class described, an inclined floor, drag stonesdisposed upon the floor, and means for moving the drag stonesalternately between the higher and the lower levels of said floor.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWIN B. GOODWIN.

Witnesses:

OARLE WHITEHEAD, ALBERT L. VoGL.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. G.

